Stress Corrosion Crack Growth Behavior of Titanium Alloy/Bioactive Glasses Sandwiches in Simulated Human Physiological Environment

材料科学技术（英文）, 2002, 18(5): 387-391.

^1, , ^2, , ^3, , ^4, , ^5,

1.Department of Materials Science, Shanghai Jiao Tong University, Shanghai 200030, China

2.Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA;Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

3.Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

4.Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

5.Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA;Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

基金项目: the National Institute of Health Foundation

Stress Corrosion Crack Growth Behavior of Titanium Alloy/Bioactive Glasses Sandwiches in Simulated Human Physiological Environment

Keywords： Stress corrosion

Based on a series of newly developed bioactive glasses having suitable thermo-mechanical properties to allow application as fixation agents between bone and titanium alloy biomedical implants, the stress corrosion crack growth(SCCG) behavior of their interfaces with Ti6Al4V was investigated in simulated body fluid (SBF) with the objectiveof discerning the salient mechanisms of crack advance and to assess the reliability of the bonds. Results indicatedthat crack growth rates in Ti6Al4V/glass/Ti6Al4V sandwich specimens were nearly the same as or slightly lowerthan those in the bulk glasses at comparable stress intensities; indeed, cracks would prefer to propagate off theinterface, suggesting that the Ti6Al4V/glass interface has relatively good crack-growth resistance. Mechanistically,interfacial crack growth appears to be controlled by the classic stress corrosion mechanisms for silicate glasses, withno discernible effect of bioactivity on the SCCG behavior being observed.

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Stress Corrosion Crack Growth Behavior of Titanium Alloy/Bioactive Glasses Sandwiches in Simulated Human Physiological Environment

参考文献